Cub fuel line

[WayneMo]

My cub gas line is a 5/16 tube that screws into the carb with a fitting that leaks and has a ferrule on it. Was the original like that with a ferrule? Or was it a 45 degree double flare or a single flare? I go a new kit for the carb and do not want to screw it up when I connect it up.
The 5/16 end then has a 1/4 tube up to the gas tank with a rubber hose making the connections to the filter and gas valve. I could jb weld the tube nut to eliminate any leakage if need be.

 

[CraigWis]

Go Over to the Photo Ad's sections. I just listed what you may need in the Parts section

 

[DMartin9N-2N]

.Good afternoon, WayneMo: I worked on my 1958 Cub LoBoy a couple weeks ago. My carb has IHC molded in the metal casting. I was surprised to find that the fuel line uses a ferrule that seals against the cast material of the carburetor. I installed a piece of new copper tubing and a new "olive" type ferrule. It sealed without any teflon or Permatex type stuff. [My old tubing and ferrule were both deformed, no wonder they had been leaking!]. Good luck with yours. whatever carb you have...
.
Dennis M. in W. Tenn.
.

 

[grandpa Love]

I took my carb to the parts store, was
able to find a brake line with correct
fitting. I cut about 4-5 inches off ,
screwed it in the carb,then used rubber
line up to the sediment bowl

 

[CraigWis]

Here are some pictures of the parts I have

 

[used red MN]

Here is what you needed, see link. YT also sells them
as item 112642. To the guy peddling your wares here
no IH letter series or probably most all true
International or Farmall tractors used a hose as a fuel
line, I cannot really say if this applies to the 86 and 88
series. It was one less thing to contribute to burning
your tractor to a cinder. Anymore they do not care if
you have a plastic tank it might as well have a plastic
line.
IH Fuel line nut and ferrule

 

[jimtrs]

The fitting with the built in ferrule in your 1st pic is OEM. As grandpa said a brake line with the double flare cut off, and a regular ferrule slipped on works too.

IMHO
Throw the rubber fuel line away. Use steel or a brake line

 

[grandpa Love]

And yet every lawn tractor has rubber
gas lines?? Even our cub cadets from
the '80s and 90s....... They run way
way hotter than a Farmall Cub. Never
had an issue

 

[gene bender]

then why do they make rubber hose for fuel

 

[Jim Becker]

(quoted from post at 09:30:43 07/24/22) then why do they make rubber hose for fuel

Mainly for auto/truck applications where the motor is mounted on rubber mounts or other locations where things can move. They have some flex to allow for motion between the parts. In those cases, the original installation usually keeps the rubber part as short as possible and uses metal the rest of the way.

 

[jimtrs]

(quoted from post at 08:26:42 07/24/22) And yet every lawn tractor has rubber gas lines?? Even our cub cadets from the '80s and 90s....... They run way way hotter than a Farmall Cub. Never had an issue

Yea but, while those engines may run hotter, I reckon the exhaust manifold on tractors is as hot or hotter than the smaller one or two cylinder air cooled engines. And they dont use updraft carburetors with a combination intake / exhaust manifold. This inherently put the fuel line very close to the extremely hot exhaust portion of the manifold.
Add to that you're probably not in the woods kicking up and running against branches with your lawnmower. Some folks are, with their gas tractors.

 

[BarnyardEngineering]

(quoted from post at 06:30:43 07/24/22) then why do they make rubber hose for fuel

Because it has its applications.

Farmall tractors where the fuel line runs right past the hot exhaust manifold is not one of them.